| http://www.w3.org/ns/prov#value | - Examples thereof are: Salts and addition compounds between ureaand inorganic compounds such as magnesium sulphate, calcium phosphate, sodium chloride, etc.The urea content of the composition according to the invention varies between 0.05% by weight and 80% by weight, preferably between 0.2% by weight and 25% by weight.
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